Browsing by Author "Christodoulakis, T."
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Canonical quantization of some midisuperspace models in 2+1 and 3+1 dimensions
Christodoulakis, T.; Doulis, G.; Terzis, P. A.; Melas, E.; Grammenos, Th; Papadopoulos, G. O.; Spanou, A. (2009)A proposal is put forward which enables the canonical quantization of a family of axially symmetric geometries in 2+1 dimensions and a corresponding spherically symmetric family in 3+1 dimensions. The proposal consists of ... 
Canonical quantization of some midisuperspace models in 3+1 dimensions
Christodoulakis, T.; Doulis, G.; Terzis, P. A.; Melas, E.; Grammenos, Th; Papadopoulos, O.; Spanou, A. (2010)A proposal is put forward which enables the canonical quantization of a family of spherically symmetric geometries in 3+1 dimensions. The proposal consists of a particular renormalization Assumption and an accompanying ... 
Canonical quantization of static spherically symmetric geometries
Christodoulakis, T.; Dimakis, N.; Terzis, P. A.; Doulis, G.; Grammenos, Th; Melas, E.; Spanou, A. (2013)The conditional symmetries of the reduced EinsteinHilbert action emerging from a static, spherically symmetric geometry are used as supplementary conditions on the wave function. Based on their integrability conditions, ... 
Conditional symmetries and the canonical quantization of constrained minisuperspace actions: The Schwarzschild case
Christodoulakis, T.; Dimakis, N.; Terzis, P. A.; Doulis, G.; Grammenos, T.; Melas, E.; Spanou, A. (2013)A conditional symmetry is defined, in the phase space of a quadratic in velocities constrained action, as a simultaneous. conformal symmetry of the supermetric and the superpotential. Iris proven that such a symmetry ... 
Decoupling of the general scalar field mode and the solution space for Bianchi type I and V cosmologies coupled to perfect fluid sources
Christodoulakis, T.; Grammenos, T.; Helias, C.; Kevrekidis, P. G.; Spanou, A. (2006)The scalar field degree of freedom in Einstein's plus matter field equations is decoupled for Bianchi type I and V general cosmological models. The source, apart from the minimally coupled scalar field with arbitrary ... 
Minisuperspace canonical quantization of the ReissnerNordstrom black hole via conditional symmetries
Christodoulakis, T.; Dimakis, N.; Terzis, P. A.; Vakili, B.; Melas, E.; Grammenos, T. H. (2014)We use the conditional symmetry approach to study the r evolution of a minisuperspace spherically symmetric model both at the classical and the quantum level. After integration of the coordinates t, theta and phi in the ... 
Towards canonical quantum gravity for 3+1 geometries admitting maximally symmetric twodimensional surfaces
Christodoulakis, T.; Doulis, G.; Terzis, P. A.; Melas, E.; Grammenos, T.; Papadopoulos, G. O.; Spanou, A. (2010)The canonical decomposition of all 3+1 geometries admitting twodimensional spacelike surfaces is exhibited as a generalization of a previous work. A proposal, consisting of a specific renormalization Assumption and an ... 
Towards canonical quantum gravity for G(1) geometries in 2+1 dimensions with Lambdaterm
Christodoulakis, T.; Doulis, G.; Terzis, P. A.; Melas, E.; Grammenos, T.; Papadopoulos, G. O.; Spanou, A. (2008)The canonical analysis and subsequent quantization of the (2+1)dimensional action of pure gravity plus a cosmological constant term is considered, under the assumption of the existence of one spacelike Killing vector ...